The React Native Course?

You use Expo in this course. Is there going to be many solution in this course who bind me to Expo? I want to learn all about react native without to have Expo as a framework. So I ask befor buying the course.

Best regards,

I have a job interview next week and they specifically asked that we come to the test without EXPO, rather with a CLI work environment
How can I change the work environment to CLI?
In addition, are there any differences between the work environments?